<html>
<head>
    <meta charset="utf-8">
    <title>登录页面</title>
    <style type="text/css">
        body {
            padding: none;
            margin: none;
            background: rgba(100, 100, 0, 0.4);
        }

        #menu {
            width: 400px;
            height: 200px;
            margin: 150px auto;
            padding:20px;
            text-align: center;
            background: rgba(200, 200, 200, 0.8);
            border-radius: 20px;
            border: 2px solid rgba(20, 20, 20, 0.2);
        }
    </style>
</head>
<body>
<div id="menu">
    hello app2
</div>

</body>
</html>